如何从UInt128类型中提取字节

using System;
using System.Numerics;

public class Program
{
    public static void Main()
    {
        UInt128 value = new UInt128(0x123456789ABCDEF0123456789ABCDEF0);
        byte[] bytes = value.ToByteArray();
        
        Console.WriteLine(string.Join(" ", bytes));
    }
}

import struct

value = 0x123456789ABCDEF0123456789ABCDEF0
bytes_array = struct.pack('>Q', value)[::-1] + struct.pack('>Q', value >> 64)[::-1]

print(bytes_array)

package main

import (
    "encoding/binary"
    "fmt"
)

func main() {
    var value uint128 = 0x123456789ABCDEF0123456789ABCDEF0
    bytes := make([]byte, 16)
    binary.BigEndian.PutUint64(bytes[0:8], uint64(value))
    binary.BigEndian.PutUint64(bytes[8:16], uint64(value>>64))

    fmt.Println(bytes)
}